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The Computing for Science (CS) group supports ILL scientists, students and visitors in a number of activities including data analysis, instrument simulation and sample simulation.

3. Displaying Data
Imagemap - Click on any point to go to the relevant paragraph. Plotting a WorkspaceBy default the number of the last workspace that was modified appears in the Plot W# button. You can decrease or increase this number by pressing the "<-" or "->" buttons, respectively. When the button is pressed a plot is made according to the setting of the other buttons. Below and BesideBy default the small plot-window (shown above) will be used for graphics, this is the Below setting. If Beside is selected plots will appear in a new window which can be rescaled and scrolled, each new plot (made by pressing Plot W# again) makes a new window which enables plots to be compared easily and stored as icons if desired. The Beside window also contains options for printing, changing colours and annotation (which have their own help files). Colours Colours can be changed by pressing the Load new Colors button on the right of the main LAMP interface or the Edit menu_bar item (and also through the Beside window described above). This brings up the "XLOADCT" utility which changes the colours of all plots interactively. "Be Good" or "Options->Plot..." ButtonThis button brings up a set preferences window, which allows you to change the titles (displayed on plots and printouts), default printer and various plot options, such as plotting surfaces with shading from a light source (default setting) or vectors which can give a multi-plot effect. Image, Contour and Surface Any combination of these display styles can be selected (and diplayed by pressing Plot W# again) the Z rotation angle for surface plots is given in the box next to the surface button. This can be modified as desired then plot again or use the right-button of the mouse to dynamicaly choose an angle; the view angle (X rotation) is set in the Plot Options menu. Ranges Once the "Range etc.." button has been pressed the X, Y range and W lim buttons appear (shown above). If a button is deselected the full range will be taken, otherwise the desired range can be entered into the windows beside the buttons. There is also a W log button to display the intensities logarithmicaly (revealing small features). Zoom To zoom in on a region of a plot press the left mouse-button and drag out a rectangle enclosing the area of interest. When you release the mouse-button the zoomed area will be plotted. Unzoom by pressing Plot W#, or Replot in the Beside window. Cursor Press the left mouse-button with the cursor-arrow in the Below plot window and the values of X, Y, and I (Intensity,W) will appear above the plot. Obviously the cursor cannot work on 3D surface plots. PrintingNormally the correct printing device will be set so that you simply press the Print Below button to obtain a hard-copy. If no device is set LAMP will make a postscript file in your current path. The printing device is set in Plot Options. Also the Beside plot can be printed if the printer is set in Plot Options (Be good) otherwise just a postscript file is made. See Graphics on Common Workspace Fuctions page for direct methods of plotting data and setting plot ranges using the formula-entry window. |